Description
The LD49150 is a high-bandwidth, low-dropout, 1.5A voltage regulator, ideal for powering core voltages of low-power microprocessors. The LD49150 implements a dual supply configuration allowing for very low output impedance and very fast transient response. The LD49150 requires a bias input supply and a main input supply, allowing for ultra-low input voltages on the main supply rail. The input supply operates from 1.4V to 5.5V and the bias supply requires between 3V and 6V for proper operation. The LD49150 offers fixed output voltages from 0.8V to 1.8V and adjustable output voltages down to 0.8V.
The LD49150 requires a minimum output capacitance for stability, and work optimally with small ceramic capacitors.

FEATURE summary
■ Input voltage range:
   VI = 1.4V to 5.5V
   VBIAS = 3V to 6V
■ Stable with ceramic capacitor
■ ±1.5% initial tolerance
■ Maximum dropout voltage (VI - VO) of 200mV
   over temperature
■ Adjustable output voltage down to 0.8V
■ Ultra fast transient response (up to 10MHz
   bandwidth)
■ Excellent line and load regulation
   specifications
■ Logic controlled shutdown option
■ Thermal shutdown and current limit protection
■ Junction temperature range: –25°C to 125°C

APPLICATIONs
■ Graphics processors
■ PC Add-In Cards
■ Microprocessor core voltage supply
■ Low voltage digital ICs
■ High Efficiency Linear power supplies
■ SMPS post regulators